Darien is a town in Genesee County, New York, United States.

Darien lies in the southwestern part of Genesee County, southwest of Batavia.

During the early historic period, the area was occupied by the Seneca people, and was referred to by them as O-so-on-to-geh, or "Place where turkeys are found".

The early town was agricultural, supplying food products to nearby urban areas, such as Buffalo.

US Route 20 (Broadway) passes across the town and intersects NY-77 at Darien Center.